The main point of dispute between the Republican and Democratic parties after the Civil War was:
A. states' rights versus nationalism.
This issue arose due to differing views on the balance of power between the federal government and the individual states. The Republican Party generally favored a stronger federal government to promote national unity and ensure the abolition of slavery, while the Democratic Party often leaned towards protecting states' rights and local autonomy.
This dispute over states' rights versus nationalism played a significant role in shaping post-Civil War politics, influencing policies related to Reconstruction, civil rights, and the balance of power between the federal government and the states. It was a fundamental ideological difference that persisted for many years and continues to influence political debates in the United States today.